/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.smt.solver External_ModelsAndUnsatCoreMode --traceabstraction.command.for.external.solver 'cvc5 --incremental --print-success --lang smt' -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/hardness-nfm22/hardness_floatingpointinfluence_no-floats_file-50.i -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-03 04:29:25,670 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-03 04:29:25,724 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-03 04:29:25,731 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-03 04:29:25,731 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-03 04:29:25,751 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-03 04:29:25,752 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-03 04:29:25,752 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-03 04:29:25,752 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-03 04:29:25,753 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-03 04:29:25,753 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-03 04:29:25,754 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-03 04:29:25,754 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-03 04:29:25,755 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-03 04:29:25,755 INFO L153 SettingsManager]: * Use SBE=true [2024-11-03 04:29:25,756 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-03 04:29:25,756 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-03 04:29:25,756 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-03 04:29:25,756 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-03 04:29:25,757 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-03 04:29:25,757 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-03 04:29:25,760 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-03 04:29:25,760 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-03 04:29:25,760 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-03 04:29:25,760 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-03 04:29:25,760 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-03 04:29:25,760 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-03 04:29:25,761 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-03 04:29:25,761 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-03 04:29:25,761 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-03 04:29:25,761 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-03 04:29:25,761 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-03 04:29:25,761 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-03 04:29:25,762 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-03 04:29:25,762 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-03 04:29:25,762 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-03 04:29:25,762 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-03 04:29:25,762 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-03 04:29:25,763 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-03 04:29:25,763 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-03 04:29:25,763 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-03 04:29:25,764 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-03 04:29:25,764 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-03 04:29:25,764 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-03 04:29:25,765 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc5 --incremental --print-success --lang smt [2024-11-03 04:29:25,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-03 04:29:25,947 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-03 04:29:25,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-03 04:29:25,951 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-03 04:29:25,951 INFO L274 PluginConnector]: CDTParser initialized [2024-11-03 04:29:25,952 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_floatingpointinfluence_no-floats_file-50.i [2024-11-03 04:29:27,146 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-03 04:29:27,317 INFO L384 CDTParser]: Found 1 translation units. [2024-11-03 04:29:27,318 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_floatingpointinfluence_no-floats_file-50.i [2024-11-03 04:29:27,329 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dd2da968/77a11e8f18654db0a5645deb586c47dd/FLAG0cdd98ff7 [2024-11-03 04:29:27,729 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dd2da968/77a11e8f18654db0a5645deb586c47dd [2024-11-03 04:29:27,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-03 04:29:27,732 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-03 04:29:27,733 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-03 04:29:27,733 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-03 04:29:27,738 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-03 04:29:27,739 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:29:27" (1/1) ... [2024-11-03 04:29:27,740 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2854d77e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:27, skipping insertion in model container [2024-11-03 04:29:27,740 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:29:27" (1/1) ... [2024-11-03 04:29:27,766 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-03 04:29:27,890 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_floatingpointinfluence_no-floats_file-50.i[916,929] [2024-11-03 04:29:27,920 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-03 04:29:27,929 INFO L200 MainTranslator]: Completed pre-run [2024-11-03 04:29:27,943 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_floatingpointinfluence_no-floats_file-50.i[916,929] [2024-11-03 04:29:27,969 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-03 04:29:27,982 INFO L204 MainTranslator]: Completed translation [2024-11-03 04:29:27,982 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:27 WrapperNode [2024-11-03 04:29:27,982 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-03 04:29:27,983 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-03 04:29:27,983 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-03 04:29:27,983 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-03 04:29:27,988 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:27" (1/1) ... [2024-11-03 04:29:27,995 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:27" (1/1) ... [2024-11-03 04:29:28,010 INFO L138 Inliner]: procedures = 27, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 147 [2024-11-03 04:29:28,011 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-03 04:29:28,011 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-03 04:29:28,011 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-03 04:29:28,011 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-03 04:29:28,019 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:27" (1/1) ... [2024-11-03 04:29:28,019 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:27" (1/1) ... [2024-11-03 04:29:28,022 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:27" (1/1) ... [2024-11-03 04:29:28,032 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-03 04:29:28,032 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:27" (1/1) ... [2024-11-03 04:29:28,033 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:27" (1/1) ... [2024-11-03 04:29:28,038 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:27" (1/1) ... [2024-11-03 04:29:28,040 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:27" (1/1) ... [2024-11-03 04:29:28,042 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:27" (1/1) ... [2024-11-03 04:29:28,043 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:27" (1/1) ... [2024-11-03 04:29:28,045 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-03 04:29:28,045 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-03 04:29:28,045 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-03 04:29:28,045 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-03 04:29:28,046 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:27" (1/1) ... [2024-11-03 04:29:28,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-03 04:29:28,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-03 04:29:28,078 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-03 04:29:28,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-03 04:29:28,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-03 04:29:28,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-03 04:29:28,101 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-03 04:29:28,101 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-03 04:29:28,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-03 04:29:28,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-03 04:29:28,200 INFO L238 CfgBuilder]: Building ICFG [2024-11-03 04:29:28,205 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-03 04:29:28,621 INFO L? ?]: Removed 16 outVars from TransFormulas that were not future-live. [2024-11-03 04:29:28,621 INFO L287 CfgBuilder]: Performing block encoding [2024-11-03 04:29:28,630 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-03 04:29:28,630 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-03 04:29:28,630 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:29:28 BoogieIcfgContainer [2024-11-03 04:29:28,631 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-03 04:29:28,632 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-03 04:29:28,633 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-03 04:29:28,635 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-03 04:29:28,635 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:29:27" (1/3) ... [2024-11-03 04:29:28,636 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f327ee5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:29:28, skipping insertion in model container [2024-11-03 04:29:28,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:27" (2/3) ... [2024-11-03 04:29:28,637 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f327ee5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:29:28, skipping insertion in model container [2024-11-03 04:29:28,637 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:29:28" (3/3) ... [2024-11-03 04:29:28,638 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_floatingpointinfluence_no-floats_file-50.i [2024-11-03 04:29:28,651 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-03 04:29:28,651 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-03 04:29:28,702 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-03 04:29:28,706 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6241f97b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-03 04:29:28,706 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-03 04:29:28,709 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 40 states have internal predecessors, (50), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-03 04:29:28,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2024-11-03 04:29:28,719 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 04:29:28,719 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 04:29:28,719 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 04:29:28,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 04:29:28,723 INFO L85 PathProgramCache]: Analyzing trace with hash -416482401, now seen corresponding path program 1 times [2024-11-03 04:29:28,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 04:29:28,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256496739] [2024-11-03 04:29:28,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 04:29:28,731 INFO L173 SolverBuilder]: Constructing external solver with command: cvc5 --incremental --print-success --lang smt [2024-11-03 04:29:28,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc5 [2024-11-03 04:29:28,733 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc5 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 04:29:28,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc5 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process [2024-11-03 04:29:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 04:29:28,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-03 04:29:28,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 04:29:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2024-11-03 04:29:28,914 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 04:29:29,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2024-11-03 04:29:29,047 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 04:29:29,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256496739] [2024-11-03 04:29:29,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [256496739] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-03 04:29:29,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-03 04:29:29,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-03 04:29:29,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745884299] [2024-11-03 04:29:29,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-03 04:29:29,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-03 04:29:29,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 04:29:29,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-03 04:29:29,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-03 04:29:29,069 INFO L87 Difference]: Start difference. First operand has 72 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 40 states have internal predecessors, (50), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 2 states have call successors, (30) [2024-11-03 04:29:29,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 04:29:29,090 INFO L93 Difference]: Finished difference Result 137 states and 244 transitions. [2024-11-03 04:29:29,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-03 04:29:29,091 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 2 states have call successors, (30) Word has length 179 [2024-11-03 04:29:29,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 04:29:29,096 INFO L225 Difference]: With dead ends: 137 [2024-11-03 04:29:29,096 INFO L226 Difference]: Without dead ends: 68 [2024-11-03 04:29:29,099 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-03 04:29:29,101 INFO L432 NwaCegarLoop]: 102 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-03 04:29:29,101 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-03 04:29:29,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-03 04:29:29,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-11-03 04:29:29,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-03 04:29:29,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 102 transitions. [2024-11-03 04:29:29,135 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 102 transitions. Word has length 179 [2024-11-03 04:29:29,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 04:29:29,135 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 102 transitions. [2024-11-03 04:29:29,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 2 states have call successors, (30) [2024-11-03 04:29:29,136 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 102 transitions. [2024-11-03 04:29:29,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2024-11-03 04:29:29,143 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 04:29:29,143 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 04:29:29,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc5 --incremental --print-success --lang smt (2)] Forceful destruction successful, exit code 0 [2024-11-03 04:29:29,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc5 --incremental --print-success --lang smt [2024-11-03 04:29:29,344 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 04:29:29,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 04:29:29,345 INFO L85 PathProgramCache]: Analyzing trace with hash -750611210, now seen corresponding path program 1 times [2024-11-03 04:29:29,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 04:29:29,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593486346] [2024-11-03 04:29:29,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 04:29:29,346 INFO L173 SolverBuilder]: Constructing external solver with command: cvc5 --incremental --print-success --lang smt [2024-11-03 04:29:29,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc5 [2024-11-03 04:29:29,347 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc5 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 04:29:29,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc5 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-11-03 04:29:29,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 04:29:29,491 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-11-03 04:29:29,516 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-03 04:29:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2024-11-03 04:29:30,508 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-03 04:30:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2024-11-03 04:30:47,176 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-03 04:30:47,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593486346] [2024-11-03 04:30:47,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1593486346] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-03 04:30:47,176 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-03 04:30:47,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 8 [2024-11-03 04:30:47,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700192097] [2024-11-03 04:30:47,177 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-03 04:30:47,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-03 04:30:47,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-03 04:30:47,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-03 04:30:47,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-03 04:30:47,181 INFO L87 Difference]: Start difference. First operand 68 states and 102 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 2 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) [2024-11-03 04:30:47,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-03 04:30:47,863 INFO L93 Difference]: Finished difference Result 209 states and 313 transitions. [2024-11-03 04:30:47,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-03 04:30:47,869 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 2 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) Word has length 180 [2024-11-03 04:30:47,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-03 04:30:47,872 INFO L225 Difference]: With dead ends: 209 [2024-11-03 04:30:47,872 INFO L226 Difference]: Without dead ends: 144 [2024-11-03 04:30:47,874 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-03 04:30:47,875 INFO L432 NwaCegarLoop]: 104 mSDtfsCounter, 112 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-03 04:30:47,876 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 436 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-03 04:30:47,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-03 04:30:47,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 131. [2024-11-03 04:30:47,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 68 states have (on average 1.161764705882353) internal successors, (79), 68 states have internal predecessors, (79), 60 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2024-11-03 04:30:47,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 199 transitions. [2024-11-03 04:30:47,903 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 199 transitions. Word has length 180 [2024-11-03 04:30:47,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-03 04:30:47,903 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 199 transitions. [2024-11-03 04:30:47,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 2 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) [2024-11-03 04:30:47,904 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 199 transitions. [2024-11-03 04:30:47,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2024-11-03 04:30:47,907 INFO L207 NwaCegarLoop]: Found error trace [2024-11-03 04:30:47,907 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-03 04:30:47,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc5 --incremental --print-success --lang smt (3)] Forceful destruction successful, exit code 0 [2024-11-03 04:30:48,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc5 --incremental --print-success --lang smt [2024-11-03 04:30:48,108 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-03 04:30:48,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-03 04:30:48,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1143638220, now seen corresponding path program 1 times [2024-11-03 04:30:48,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-03 04:30:48,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169316996] [2024-11-03 04:30:48,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-03 04:30:48,109 INFO L173 SolverBuilder]: Constructing external solver with command: cvc5 --incremental --print-success --lang smt [2024-11-03 04:30:48,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc5 [2024-11-03 04:30:48,111 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc5 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-03 04:30:48,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc5 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2024-11-03 04:30:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-03 04:30:48,456 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 102 conjuncts are in the unsatisfiable core [2024-11-03 04:30:48,462 INFO L278 TraceCheckSpWp]: Computing forward predicates...